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2Shee`ts-Sheret2.

D. BULL.

lImprovement in Blind Hinges.

N0. 132,748. PatentedlNov.5,187v2.

, WB CrgmHmA/LMM nrrnn Stearns @maar @Prion DANIEL BULL,'OF AMBOY, ILLINOIS.

IMPRVEWENT IN BLINDHINGES.

Specification forming part of Letters Patent No. 32,748, dated November 5, 1872; antedated November 4,

- closed; Fig. 2 is a side elevation of the same;

Fig. 3 is a top view ofthe lower socket detached from the easement; Fig. 4 is a rear view ofthe lower thole or pin detached from the blind 5 Fig. 5 is a section of said thole7 or pin on the line :l: ot' Fig. 4, and Fig. 6 is a front elevation of a blind mounted with my improved hinges, the blind being shown open.

Like letters of reference made use of indicate like parts in the several figures.

Nature of the Intention.

This invention relates to certain improvements in the construction of blind hinges or hangers, having for an object and purpose to so han g the blind that it may be readily opened and closed and removed from the hinges when desired, but so made and put together that the blind cannot be blown shut when opened, nor thrown oft' in the attempt to close it, nor require to be lifted vertically to overcome a lock in closing, as is the case with some styles of hinge in use; and also so made and put together that the blind cannot be removed from the easement except at one point in its swing or circuit, that point being` taken where the blind stands at right angles to the wall; and the invention consists in the novel construction and arrangement of the upper and lower hinges, as will more fully hereinafter appear.

To enable those skilled in the art to make and use my invention, I will proceed to den scribe the same with particularity, making use,

in so doing, of the aforesaid drawing by letters ot' reference. y

General Description. A in the drawing represents the blind, and B the easement. O is the upper socket, and C the lower socket, both secured to the casein ent by screws or other means. D is the upper thole or pin,andD the lower one, both attached to the blind by suitable means. The upper thole D is connected to its fastening-plate a by two arms, one of which, b, passes from the upper end of the thole to theplate, and the other of which, b', passes from the lower end of said thole or pin to said plate, leaving an interval between the two of a -suflcient width to span the substance of the spiral socket-ring of the upper socket. This upper socket, made with the spiral socket-ring C, is attached to its fastening-plate c, and rises with an infinite or increasing spiral upward from the side next the window. The sides of this ring are vertical, and the aperture it incloses of a diameter sulhcient to contain the thole D and allow it to freelyturn. At the center of this ring is a vertical slit, d, wide enough to allow of the passage of the arm b' in hanging or removing the blind, but not wide enough to pass the thole. The lower thole D is attached to its fastening-plate a by a single arm, b, at its upper extremity, which, like the upper arm of the upper thole, rests upon the upper surface of its socket. The lower socket C' is made upon a similar rising spiral to the socket above, but is continuous from side to side, and in this direction of a greater diameter than the upper socket. Within the aperture of this socket, and extending from its lower edge or surface to about half the height of the band or vring,is the projection e, and upon the outside of the said band or ring is the projection f.

The blind is mounted upon the easement by inserting the lower points of the tholes into their respective sockets, with the blind standing at right angles to the easement. At this position the lower arm b of the upper thole will descend through the slit d and the arms b b rest upon the upper and lower spirals, respectively. When the blind is closed, as at Fig. l, the arms b b rest upon the lowest portion of the spirals, and as the blind is swung open the said arms ride upon the spirals and lift the blind gradually to the highest portion of the spiral after the manner usual with the wellknown spiral hinge commonly employed upon gates, the greatest height being attained when the blind is fully opened. The arm b" of the lower thole D is long enough being somewhat longer than those of the upper tholeto carry the blind so far out that the projection or edge i upon the fastening-plate of the lower thole will clear the projection f and allow the blind to swingwide open. The projection fi, however, in the latter part oi' its circuit, bears against the outer edge ofthe projection j'. When the blind has reached the highest limit ofthe spiral the projection fi passes the projection f, and the blind, which has, for the instant, stood at an incline, drops to the vertical position, the projection i locking behind the projection f and the inner projection c entering a hollow, m, in the side ofthe lower thole D made to receive it at this point, thus locking the blind open with a double lock.

When the blind is to be closed the hand may be placed against it at or near the lower hin ge and a push given sufficient to tilt it enough out of the vertical to disengage the hollow or recess m from the inner projection c and cause the projection i to clear the projection f, when the weight of the blind will cause it to ride down around the spiral and close.

It will be noticed that the upper arm b of the upper thole is sufficiently heavier and thicker than the lower arm b of the same thole as to prevent said upper arm from descending into the slit d. should the parts of the lower thole wear sufficiently to indicate such a probability.

By reason of the lower arm b of the upper thole it is impossible to throw the blind from the hinges accidentally in closing,` it, which is a common fault in ordinary blinds.

' Claims.

recess m and projection t', as specified and shown.

DANIEL BULL. lVitnesses:V

A. A. SMITH, C. D. VAUGHAN. 

